Lichuan is located in the southwest of Hubei Province, which is the eastern extension of Yunnan Guizhou Plateau. It is located at the intersection of Wuling mountain area, Daba Mountain and Wushan mountain range. In the fourth century, it was influenced by many rare plants. It is the site of Qingjiang biota in the Precambrian "fossil treasure house" of more than 500 million years. In addition, it is located in the transition zone between the western plateau and the northern hills, which is the intersection and infiltration center of multiple organisms in the northern and southern regions, with biological diversity, which provides conditions for the survival and reproduction of many local tea species. According to Professor Ni Dejiang, doctoral supervisor of Huazhong Agricultural University, he pointed out that Lichuan is one of the regions with the largest number of local tea species in southern China. At present, there are more than 40 varieties known. The main local varieties of lichuanhong, such as lenghouhun and Xiaoye tea in Zhonglu Town, have high contents of amino acids, thearubin, theaflavin and theabrownin. It has laid a specific quality foundation for the "lichuanhong" new style black